本文实例讲述了PHP限制HTML内容中图片必须是本站的方法。分享给大家供大家参考。具体实现方法如下:
1. PHP代码如下:
<?php
$dom = new DOMDocument;
$dom->loadHTML(file_get_contents('input.html'));
$xpath = new DOMXpath($dom);
$img = $xpath->query('//img');
foreach($img as $i) {
$url = parse_url($i->getAttribute('src'));
if(isset($url['host']) && in_array($url['host'], array('yourdomain.com', 'www.yourdomain.com')) == false) {
// show an error
// -- or --
// remove the tag: $i->parent->removeChild($i)
echo sprintf('[FAIL] %s' . PHP_EOL, $i->getAttribute('src'));
}
else {
echo sprintf('[PASS] %s' . PHP_EOL, $i->getAttribute('src'));
}
}
2. 测试HTML代码:
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p><img src="/image.jpg"></p>
<p><img src="http://yourdomain.com/image.jpg"></p>
<p><img src="http://www.yourdomain.com/image.jpg"></p>
<p><img src="http://otherdomain.com/image.jpg"></p>
3. 运行结果:
[PASS] /image.jpg
[PASS] http://yourdomain.com/image.jpg
[PASS] http://www.yourdomain.com/image.jpg
[FAIL] http://otherdomain.com/image.jpg